#include<stdio.h>
#include<stdlib.h>
#include"math.h"
#include"mystdio.h"
int main()
{
    myFILE* fp = my_fopen("log.txt","w");
    char* str = "hello world";
    my_fwrite(fp,str,strlen(str));
    my_fclose(fp);
    printf("%d",Add(1,2));
    printf("hello world\n");
    return 0;
}